A torch was a light source.
History
In 102, the Eleventh Doctor, Amy Pond and River Song used flaming torches while exploring underhenge. (TV: The Pandorica Opens) In April 1996, Amelia Pond used a torch one night when she went outside to investigate a mysterious police box that crashed into her garden shed at Easter 1996. (TV: The Eleventh Hour) She, the Doctor and River Song and a group of soldiers later used torches when confronting the Weeping Angels. (TV: Flesh and Stone)
In 1963, while exploring the junkyard, Ian Chesterton used a torch, but he dropped it and lost it. (TV: "An Unearthly Child")
In Amsterdam in January 1983, Colin Frazer used a torch while he and Robin Stuart made their way through Frankendael. (TV: Arc of Infinity)
In the 2010s, Kate Stewart had a torch app on her mobile phone. (AUDIO: Invocation)
On 27 July 2012, the Tenth Doctor carried the Olympic Torch when the original torchbearer fell and used it to light the Olympic Flame. (TV: Fear Her) He also used a torch when stranded with a group of people, (TV: Midnight) when facing the Vashta Nerada, (TV: Silence in the Library) and when walking through an underground entrance to a Cyber factory on an alternate earth with Mrs Moore. (TV: The Age of Steel)
The home of Peladon's ruler was lit with torches. (TV: The Curse of Peladon, The Monster of Peladon)
On Desperus in 4000, Bors, Garge and Kirksen used torches to investigate the landing of the Spar. (TV: The Daleks' Master Plan)
In the TARDIS, during a partial blackout due to a time override, the Fifth Doctor asked Turlough to find electric torches, eventually used by them. (TV: Enlightenment)
The Twelfth Doctor's sonic screwdriver functioned as a torch. (TV: Thin Ice, Oxygen)
The Thals referred to torches as "firelights". Fifty cycles after the Thal-Dalek battle, two parties that had entered the ruined Dalek City used their torches to navigate the now darkened corridors. (AUDIO: Return to Skaro)
